Dial wheel assembly, traction mechanism, endoscope, and method for tensioning traction ropes
By designing the dial assembly and utilizing the rotatable and fixed connection between the first and second dials, the problem of inconsistent tension of the endoscope traction rope was solved, achieving uniform tension of the traction rope and ease of operation, thus improving the production quality of the endoscope.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUNAN VATHIN MEDICAL INSTR CO LTD
- Filing Date
- 2025-12-05
- Publication Date
- 2026-06-11
AI Technical Summary
In related technologies, the tension of the traction rope in endoscopes is inconsistent, which may cause the active bending section to bend towards the side with greater tension in the traction rope in the initial state, affecting the production quality of the endoscope.
The system employs a dial assembly, including a first and a second dial, connected by fasteners. In the first state, the dials are rotatable, while in the second state, they are fixed. The operator can control the dials to rotate in opposite directions with one hand to tension the traction rope and easily switch states to adjust the angle as needed.
It improves the consistency of traction rope tension, simplifies the retensioning process, makes operation easier, solves the problem of inconsistent traction rope tension, and improves the production quality of endoscopes.
Smart Images
Figure CN2025140213_11062026_PF_FP_ABST
Abstract
Description
Dial assembly, traction mechanism, endoscope and tensioning method of traction rope Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to a dial assembly, a traction mechanism, an endoscope, and a method for tensioning a traction rope. Background Technology
[0002] In related technologies, the distal end of the endoscope insertion section is an actively bending section. Two traction ropes are installed inside the handle, with their distal ends connected to the actively bending section and their proximal ends fixed to a dial. In its natural state, both traction ropes are taut. By moving a lever, the two traction ropes can move synchronously in opposite directions, causing the actively bending section of the insertion section to bend. In these technologies, tensioning of the two traction ropes is achieved through a matching male and female connector. However, this tensioning method suffers from poor consistency in the tension of the two traction ropes, causing the actively bending section of the endoscope to initially bend towards the side with greater traction rope tension, affecting the endoscope's manufacturing quality. Summary of the Invention
[0003] This invention discloses a dial assembly, a traction mechanism, an endoscope, and a traction rope tensioning method to solve the technical problem in related technologies where the tension of the two traction ropes is inconsistent.
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] The dial assembly of the present invention is used on a traction mechanism. The dial assembly includes a first disc and a second disc. The first disc is used to fix a first traction rope of the traction mechanism, and the second disc is used to fix a second traction rope of the traction mechanism. The dial assembly also includes a fastener for connecting the first disc and the second disc. The fastener has at least a first state and a second state. When the fastener is in the first state, the first disc and the second disc are rotatably connected. When the fastener is in the second state, the first disc and the second disc are fixedly connected.
[0006] The traction mechanism of the present invention is used on an endoscope. The traction mechanism includes a dial assembly, which is the dial assembly of any of the technical solutions of the present invention. The traction mechanism also includes a first traction rope and a second traction rope. The distal end of the first traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the first wheel of the dial assembly. The distal end of the second traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the second wheel of the dial assembly.
[0007] The endoscope of the present invention includes a handle and an insertion part, the handle and the insertion part are connected, and the handle includes a traction mechanism, which is the traction mechanism of any of the technical solutions of the present invention.
[0008] The traction rope tensioning method of the dial assembly based on any technical solution of the present invention includes the following steps: fixing the distal end of the first traction rope of the traction mechanism to the distal end of the active bending section of the insertion part, and fixing the proximal end to the first wheel; fixing the distal end of the second traction rope of the traction mechanism to the distal end of the active bending section of the insertion part, and fixing the proximal end to the second wheel; controlling the fastener to be in a first state; controlling the first wheel and the second wheel to rotate, and putting the first traction rope and the second traction rope in a tensioned state; controlling the fastener to be in a second state.
[0009] The technical solution adopted in this invention can achieve the following beneficial effects:
[0010] In the process of tensioning the first and second traction ropes, the fastener can be initially in a first state, in which the first and second wheel disks are rotatably connected. The operator can control the first and second wheel disks to rotate simultaneously in opposite directions with one hand, so that the proximal ends of the first and second traction ropes move closer to each other, thereby achieving tensioning of the first and second traction ropes. After the first and second traction ropes are tensioned, the fastener is controlled to be in a second state, in which the first and second wheel disks are fixedly connected, and the positions of the first and second traction ropes are fixed. At the same time, when force is applied to the actuating member, the first and second wheel disks can rotate simultaneously.
[0011] As can be seen, the dial assembly of the present invention allows the first and second traction ropes to rotate simultaneously in opposite directions with only one hand during the tensioning process, which improves the consistency of the force on the first and second traction ropes and thus improves the consistency of the tension of the first and second traction ropes. This solves the problem of poor consistency of tension of the two traction ropes when tensioning traction ropes in related technologies.
[0012] On the other hand, when the pulley assembly of the present invention needs to re-tension the first and second traction ropes, it is only necessary to switch the fastener from the second state to the first state, readjust the rotation angle of the first and second wheel disks, and then switch the fastener back to the second state. Compared with the prior art method of re-tensioning the first and second traction ropes, it has the advantages of simple process and easy operation. Attached Figure Description
[0013] The accompanying drawings described below are merely some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0014] Figure 1 is a schematic diagram of the endoscope used in this application;
[0015] Figure 2 is a schematic diagram of the engagement between the dial assembly and the actuating element in an embodiment of this application;
[0016] Figure 3 is a first schematic diagram of the dial assembly according to an embodiment of this application;
[0017] Figure 4 is a second schematic diagram of the dial assembly according to an embodiment of this application;
[0018] Figure 5 is a third schematic diagram of the dial assembly according to an embodiment of this application;
[0019] Figure 6 is a schematic diagram of the first roulette wheel in an embodiment of this application;
[0020] Figure 7 is a schematic diagram of the second roulette wheel according to an embodiment of this application;
[0021] Figure 8 is a schematic diagram of the fixed shaft according to an embodiment of this application.
[0022] In the diagram: 100, dial assembly; 110, first wheel; 111, first fixing part; 112, receiving groove; 113, slide groove; 114, second mounting hole; 120, second wheel; 121, second fixing part; 122, protrusion; 123, first mounting hole; 124, third mounting hole; 130, fastener; 131, bolt; 132, nut; 200, traction mechanism; 210, first traction rope; 220, second traction rope; 230, fixed shaft; 240, actuating element; 300, handle; 400, insertion part; 410, active bending section; 420, passive bending section. Detailed Implementation
[0023] The embodiments described below are merely some, not all, of the embodiments of the present invention. All other implementations derived by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0024] In this application, "near end" and "far end" refer to the two ends of each component relative to the user's location in the usage environment. The end closer to the user is designated as "near end", and the end farther from the user is designated as "far end".
[0025] In the related technology, when tensioning is achieved, the distal ends of the first and second traction ropes are fixedly connected to the distal end of the active bending section, the proximal end of the first traction rope is fixedly connected to the male connector, and the proximal end of the second traction rope is fixedly connected to the female connector. The male connector is fixedly connected to the female connector by a threaded connection. After fixing the male and female connectors, the tensioning of the first and second traction ropes can be achieved.
[0026] However, when the male and female connectors are mated, they need to be rotated. After rotating to a certain extent, the rotation of the male and female connectors will cause the first and second traction ropes to twist. When the male and female connectors are rotated into place, the torsional force of the first and second traction ropes may cause the male and female connectors to reverse, resulting in loosening between them. In related technologies, after the male and female connectors are rotated into place, an adhesive application is usually performed between them to overcome the torsional force of the first and second traction ropes through the adhesive effect.
[0027] On the other hand, during the rotation of the male and female connectors, the male and female connectors are controlled by different hands of the operator, which poses a risk of inconsistent force on the male and female connectors, resulting in inconsistent tension of the first and second traction ropes. Usually, the first and second traction ropes need to be retightened at this point. However, since the male and female connectors are already bonded with adhesive, retightening the first and second traction ropes is not only complex but also quite difficult.
[0028] Furthermore, during the tensioning process of the first and second traction ropes, operators often find it difficult to determine whether their tension levels are consistent. The specific reason is that during the tensioning process, the active bending section is fixed to the fixture and remains straight. Even if the tension levels of the first and second traction ropes are inconsistent, the active bending section remains straight under the action of the fixture, making it difficult for operators to determine whether the tension levels of the first and second traction ropes are consistent.
[0029] To address this, this application provides a dial assembly comprising a first dial and a second dial, which are rotatably connected. During the tensioning of the first and second traction ropes, the operator can control the first and second dials to rotate simultaneously in opposite directions using one hand, thereby improving the consistency of force on the first and second dials and thus improving the consistency of the tension of the first and second traction ropes. After the first and second traction ropes are tensioned, the first and second dials are fixedly connected, and when force is applied to the actuating member 240, the first and second dials can rotate simultaneously.
[0030] The following description, in conjunction with Figures 1 to 8, details the dial assembly, traction mechanism, endoscope, and traction rope tensioning method provided in this application through specific embodiments and application scenarios.
[0031] The dial assembly of this embodiment is used on the traction mechanism 200 of the endoscope, as shown in Figure 1. The endoscope includes a handle 300 and an insertion part 400. The handle 300 is provided with operating parts for easy operation by the doctor. The insertion part 400 is used for insertion into a cavity, as shown in Figure 1. The distal end of the insertion part 400 has an active bending section 410, and the distal end face of the active bending section 410 is provided with structures such as a camera module, as shown in Figure 1. The traction mechanism 200 is located on the handle 300. The traction mechanism 200 has a first traction rope 210 and a second traction rope 220. By controlling the synchronous and opposite movement of the first traction rope 210 and the second traction rope 220, the bending of the active bending section 410 can be achieved.
[0032] The dial assembly of this embodiment includes a first dial 110 and a second dial 120, as shown in Figures 2-4. The first dial 110 and the second dial 120 serve as the mounting base for the first traction rope 210 and the second traction rope 220. Exemplarily, the distal end of the first traction rope 210 is fixed to the distal end of the active bending section 410, and the proximal end of the first traction rope 210 is fixed to the first dial 110, as shown in Figure 3. Exemplarily, the distal end of the second traction rope 220 is fixed to the distal end of the active bending section 410, and the proximal end of the second traction rope 220 is fixed to the second dial 120, as shown in Figure 3. Exemplarily, the distal and proximal ends of the first traction rope 210 and the second traction rope 220 can be fixed by welding or bonding.
[0033] In some embodiments, the dial assembly further includes a fastener 130 for connecting the first dial 110 and the second dial 120, as shown in Figures 2-4. Preferably, the fastener 130 has at least a first state and a second state. When the fastener 130 is in the first state, the first dial 110 and the second dial 120 are rotatably connected; when the fastener 130 is in the second state, the first dial 110 and the second dial 120 are fixedly connected.
[0034] Specifically, when the fastener 130 is in the first state, the first wheel 110 and the second wheel 120 are rotatably connected, allowing them to rotate relative to each other under stress. When the fastener 130 is in the second state, the first wheel 110 and the second wheel 120 are fixedly connected, preventing them from rotating relative to each other under stress; however, they can rotate synchronously under stress, meaning that when the first wheel 110 rotates, it can drive the second wheel 120 to rotate, or vice versa.
[0035] In this embodiment, the fastener 130 for connecting the first wheel 110 and the second wheel 120 has at least two states. For example, during the tensioning of the first traction rope 210 and the second traction rope 220, the fastener 130 can first be in the first state. At this time, the first wheel 110 and the second wheel 120 are rotatably connected, and the operator can control the first wheel 110 and the second wheel 120 to rotate simultaneously in opposite directions with one hand (rotation in opposite directions means that one of the first wheel 110 and the second wheel 120 rotates clockwise, and the other...). One rotates counterclockwise, causing the proximal ends of the first traction rope 210 and the second traction rope 220 to move closer to each other, thereby tensioning the first traction rope 210 and the second traction rope 220. After the first traction rope 210 and the second traction rope 220 are tensioned, the control fastener 130 is in the second state. At this time, the first wheel 110 and the second wheel 120 are fixedly connected, and the positions of the first traction rope 210 and the second traction rope 220 are fixed. At the same time, when force is applied to the actuating member 240, the first wheel 110 and the second wheel 120 can rotate simultaneously.
[0036] For example, when the operator controls the first wheel 110 and the second wheel 120 to rotate in opposite directions, he can apply force to the second wheel 120 with his thumb and to the first wheel 110 with his index or middle finger.
[0037] As can be seen, in the process of tensioning the first traction rope 210 and the second traction rope 220, the dial assembly of this embodiment only requires one hand to control the first wheel 110 and the second wheel 120 to rotate simultaneously in opposite directions. This can improve the consistency of the force on the first wheel 110 and the second wheel 120, thereby improving the consistency of the tension of the first traction rope 210 and the second traction rope 220. This solves the problem of poor consistency of the tension of the two traction ropes when tensioning traction ropes in related technologies.
[0038] On the other hand, when the dial assembly of this embodiment needs to re-tension the first traction rope 210 and the second traction rope 220, it is only necessary to switch the fastener 130 from the second state to the first state, readjust the rotation angle of the first wheel 110 and the second wheel 120, and then switch the fastener 130 back to the second state. Compared with the prior art method of re-tensioning the first traction rope 210 and the second traction rope 220, it has the advantages of simple process and easy operation.
[0039] In some embodiments, the first wheel 110 is provided with a first fixing part 111 for fixing the first traction rope 210, and the first fixing part 111 protrudes from the side wall of the first wheel 110, as shown in FIG6. The second wheel 120 is provided with a second fixing part 121 for fixing the second traction rope 220, and the second fixing part 121 protrudes from the side wall of the second wheel 120, as shown in FIG7.
[0040] In this embodiment, the first traction rope 210 is fixed to the first fixing part 111, and the second traction rope 220 is fixed to the second fixing part 121. The first fixing part 111 protrudes from the side wall of the first wheel 110, and the second fixing part 121 protrudes from the side wall of the second wheel 120. This provides the advantage of easy installation and fixing of the first traction rope 210 and the second traction rope 220. On the other hand, during the process of controlling the first wheel 110 and the second wheel 120 to rotate in opposite directions, the first fixing part 111 and the second fixing part 121 can serve as the fulcrum for the operator's force application. For example, the operator applies force to the second fixing part 121 with the thumb of one hand and applies force to the first fixing part 111 with the middle or index finger, and then pinches the first fixing part 111 and the second fixing part 121 together. This allows the operator to control the first wheel 110 and the second wheel 120 to rotate in opposite directions simultaneously with one hand.
[0041] In some embodiments, the distance between the first fixing part 111 and the second fixing part 121 satisfies: L1 < 1 / 3L2. Preferably, the distance between the first fixing part 111 and the second fixing part 121 satisfies: L1 < 1 / 4L2. L1 is the sum of the arc lengths of the first wheel 110 and the second wheel 120 between the first fixing part 111 and the second fixing part 121, and L2 is the circumference of the disk on which the first wheel 110 or the second wheel 120 is located.
[0042] As can be seen, the sum of the arc lengths of the first disc 110 and the second disc 120 is such that for the overlapping parts of the first disc 110 and the second disc 120, it is only necessary to calculate the arc length of the first disc 110 or the second disc 120.
[0043] In this embodiment, controlling the distance between the first fixing part 111 and the second fixing part 121 makes it easier for the operator to apply force to the first fixing part 111 and the second fixing part 121, so that the first wheel 110 or the second wheel 120 rotates in opposite directions.
[0044] In some embodiments, one of the first disc 110 and the second disc 120 is further provided with a protrusion 122. The protrusion 122 protrudes from the sidewall of the first disc 110 or the second disc 120, and the distance between the protrusion 122 and the first fixing part 111 or the second fixing part 121 satisfies: L3 < 1 / 3L2. Figure 7 shows a schematic diagram of the second disc 120 having a protrusion 122. Preferably, the distance between the protrusion 122 and the first fixing part 111 or the second fixing part 121 satisfies: L3 < 1 / 4L2. L2 is the circumference of the disc on which the first disc 110 or the second disc 120 is located, and L3 is the sum of the arc lengths of the first disc 110 and / or the second disc 120 between the protrusion 122 and the first fixing part 111 or the second fixing part 121.
[0045] In this embodiment, when the arc length distance between the first fixing part 111 and the second fixing part 121 is large, a protrusion 122 is also provided on the first wheel 110 or the second wheel 120. The protrusion 122 serves as the force application point for the operator, which facilitates the operator to apply force to the first fixing part 111 and the second fixing part 121.
[0046] In some embodiments, the first wheel 110 and the second wheel 120 overlap each other. Exemplarily, the first wheel 110 and the second wheel 120 may have the same or different dimensions. In this embodiment, the overlapping structure of the first wheel 110 and the second wheel 120 not only allows for opposite rotation of the first wheel 110 and the second wheel 120, but also improves the compactness of the wheel assembly structure.
[0047] In some embodiments, one of the first wheel 110 and the second wheel 120 is provided with a receiving groove 112, and the other of the first wheel 110 and the second wheel 120 is embedded in the receiving groove 112, forming a nested structure, as shown in Figures 2 to 6. For example, as shown in Figure 6, the first wheel 110 is provided with a receiving groove 112, and the second wheel 120 is embedded in the receiving groove 112, forming a nested structure. However, it is not limited to this; the receiving groove 112 can also be provided on the second wheel 120, and then the first wheel 110 can be embedded in the receiving groove 112 of the second wheel 120.
[0048] For example, the first disc 110 is provided with a receiving groove 112, and the second disc 120 is embedded in the receiving groove 112. In this case, the size of the receiving groove 112 is greater than or equal to the size of the second disc 120, so as to provide sufficient clearance for the rotation of the first disc 110 and the second disc 120. For example, the second disc 120 may be a disc of the same size as the first disc 110; or the area of the second disc 120 may be smaller than that of the first disc 110.
[0049] For example, after the second wheel 120 is embedded in the receiving groove 112, the two side walls of the second wheel 120 do not contact the first wheel 110, that is, there is a certain gap between the two side walls of the second wheel 120 and the first wheel 110, thereby reducing the friction force of the first wheel 110 during the process of the two wheel 120 rotating in opposite directions.
[0050] In this embodiment, the first wheel 110 and the second wheel 120 form a nested structure through the receiving groove 112. This not only enables the first wheel 110 and the second wheel 120 to rotate in opposite directions, but also improves the compactness of the wheel assembly structure. Furthermore, the nested structure of the first wheel 110 and the second wheel 120 allows the receiving groove 112 to limit the movement of either the first wheel 110 or the second wheel 120 when they rotate in opposite directions. This reduces the risk of the first wheel 110 or the second wheel 120 shifting in its axial direction, thereby improving the consistency of the circumferential movement of the first wheel 110 and the second wheel 120, and further improving the consistency of the tension of the first traction rope 210 and the second traction rope 220.
[0051] In some embodiments, the first wheel 110 and the second wheel 120, which have a receiving groove 112, also have a sliding groove 113, and the other has a first mounting hole 123, as shown in Figures 2-7. The sliding groove 113 and the first mounting hole 123 are interconnected and are used to install the fastener 130, as shown in Figures 2-7. For example, the first wheel 110 has a sliding groove 113, and the second wheel 120 has a first mounting hole 123, as shown in Figures 2-7. For example, the fastener 130 includes a bolt 131 and a nut 132. After the bolt 131 is installed in the sliding groove 113 and the first mounting hole 123, the bolt 131 can pass through the first wheel 110 and the second wheel 120. Then, the nut 132 is installed on the bolt 131 to fix the first wheel 110 and the second wheel 120 together.
[0052] For example, when the fastener 130 is in the first state, the bolt 131 and the nut 132 are loosened, thereby making the first wheel 110 and the second wheel 120 movable; when the fastener 130 is in the second state, the bolt 131 and the nut 132 are tightened, thereby making the first wheel 110 and the second wheel 120 fixedly connected.
[0053] In some embodiments, the slide groove 113 has an arc-shaped structure, and the projection of the slide groove 113 in the direction of the second wheel 120 is at least partially located on the second wheel 120, as shown in Figures 2 to 6. In this embodiment, the slide groove 113 has an arc-shaped structure, which provides space for the sliding of the fastener 130. Before the first wheel 110 and the second wheel 120 rotate in opposite directions, the first wheel 110 and the second wheel 120 can be initially fixed by the fastener 130 to reduce the risk of the first wheel 110 or the second wheel 120 shifting, thereby further improving the consistency of the movement of the first wheel 110 and the second wheel 120, and further improving the consistency of the tension of the first traction rope 210 and the second traction rope 220.
[0054] In some embodiments, the first wheel 110 is provided with a second mounting hole 114, and the second wheel 120 is provided with a third mounting hole 124. The second mounting hole 114 and the third mounting hole 124 are coaxially arranged, as shown in Figures 2 to 7. In this embodiment, the coaxial arrangement of the second mounting hole 114 and the third mounting hole 124 can further improve the consistency of rotation of the first wheel 110 and the second wheel 120, thereby further improving the consistency of tension of the first traction rope 210 and the second traction rope 220.
[0055] In some embodiments, one of the second mounting hole 114 and the third mounting hole 124 is fixedly connected to the fixed shaft 230 of the traction mechanism 200, and the other is rotatably connected to the fixed shaft 230. For example, the second mounting hole 114 is fixedly connected to the fixed shaft 230 of the traction mechanism 200, and the third mounting hole 124 is rotatably connected to the fixed shaft 230. For instance, the second mounting hole 114 and the fixed shaft 230 are provided with meshing racks, thereby fixing the first wheel 110 to the fixed shaft 230, as shown in Figures 6 and 8. For example, the second mounting hole 114 is partially or completely meshed with the fixed shaft 230. The surface of the third mounting hole 124 is smooth, and the engagement of the third mounting hole 124 with the smooth portion of the fixed shaft 230 allows the second wheel 120 to be rotatably connected to the fixed shaft 230.
[0056] In some embodiments, both the second mounting hole 114 and the third mounting hole 124 are fixedly connected to the fixed shaft 230 of the traction mechanism 200. For example, both the second mounting hole 114 and the third mounting hole 124 engage with the fixed shaft 230, thereby fixing the first wheel 110 and the second wheel 120 to the fixed shaft 230.
[0057] It is known that after the first traction rope 210 and the second traction rope 220 are tensioned, the first wheel 110 and the second wheel 120 are then engaged with the fixed shaft 230 to prevent the first wheel 110 and the second wheel 120 from being blocked by the fixed shaft 230 during rotation.
[0058] The traction mechanism in this embodiment is used on an endoscope. Specifically, the traction mechanism is used to adjust the curvature of the active bending section 410 of the endoscope.
[0059] The traction mechanism of this embodiment includes a dial assembly 100, which is a dial assembly according to any technical solution in this embodiment, as shown in Figure 2. The traction mechanism also includes a first traction rope 210 and a second traction rope 220. The distal end of the first traction rope 210 is fixed to the distal end of the active bending section 410 of the insertion part 400, and the proximal end is fixed to the first wheel 110 of the dial assembly 100. The distal end of the second traction rope 220 is fixed to the distal end of the active bending section 410 of the insertion part 400, and the proximal end is fixed to the second wheel 120 of the dial assembly 100.
[0060] As can be seen, the traction mechanism also includes a fixed shaft 230 and an actuating element 240, as shown in Figure 2. The fixed shaft 230 is installed in the second mounting hole 114 and the third mounting hole 124. The actuating element 240 is fixedly connected to the fixed shaft 230. The actuating element 240 is a lever or a knob. The actuating element 240 is located outside the endoscope handle 300, so that by controlling the actuating element 240, the dial assembly 100 can be driven to rotate, thereby driving the first traction rope 210 and the second traction rope 220 to move, thereby realizing the control of the bending angle of the active bending section 410.
[0061] The traction mechanism of this embodiment has a dial assembly 100 of any one of the embodiments in this embodiment. During the tensioning process of the first traction rope 210 and the second traction rope 220, it can improve the consistency of the tension of the first traction rope 210 and the second traction rope 220. On the other hand, when it is necessary to re-tension the first traction rope 210 and the second traction rope 220, it also has the advantages of simple process and easy operation.
[0062] The endoscope of this embodiment includes a handle 300 and an insertion part 400, which are connected as shown in Figure 1. The handle 300 includes a traction mechanism 200, which is a traction mechanism according to any of the technical solutions in this embodiment. The insertion part 400 includes an active bending section 410 and a passive bending section 420 connected to each other, as shown in Figure 1. The structure of the insertion part 400 can be the same as that of the prior art, and will not be described in detail here.
[0063] The endoscope in this embodiment can be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. This embodiment does not impose specific restrictions on the type of endoscope.
[0064] The endoscope in this embodiment has a traction mechanism in the handle 300, which can improve the consistency of the tension of the first traction rope 210 and the second traction rope 220; when it is necessary to re-tension the first traction rope 210 and the second traction rope 220, it also has the advantages of simple process and easy operation.
[0065] The traction rope tensioning method of this embodiment is implemented based on the dial assembly of any technical solution in this embodiment. In some embodiments, the traction rope tensioning method of this embodiment includes the following steps:
[0066] Step S100: Fix the distal end of the first traction rope 210 of the traction mechanism 200 to the distal end of the active bending section 410 of the insertion part 400, and fix the proximal end to the first wheel 110.
[0067] Step S200: Fix the distal end of the second traction rope 220 of the traction mechanism 200 to the distal end of the active bending section 410 of the insertion part 400, and fix the proximal end to the second wheel 120.
[0068] Step S300: Control the fastener 130 to be in the first state. Specifically, control the fastener 130 to be in the loosened state, thereby making the first wheel 110 and the second wheel 120 rotatably connected.
[0069] Step S400: Control the rotation of the first wheel 110 and the second wheel 120, and keep the first traction rope 210 and the second traction rope 220 in a taut state. Specifically, before controlling the rotation of the first wheel 110 and the second wheel 120, the first traction rope 210 and the second traction rope 220 are pre-tensioned, so that the first traction rope 210 and the second traction rope 220 initially maintain approximately the same tension; then control the first wheel 110 and the second wheel 120 to rotate in opposite directions, thereby keeping the first traction rope 210 and the second traction rope 220 in a taut state.
[0070] Step S500: Control the fastener 130 to be in the second state. Specifically, control the fastener 130 to be in the tightened state, thereby fixing the first wheel 110 and the second wheel 120 together.
[0071] In some embodiments, when the consistency of the tension of the first traction rope 210 and the second traction rope 220 does not meet the requirements and it is necessary to re-tension the first traction rope 210 and the second traction rope 220, it is only necessary to switch the fastener 130 to the first state and then control the rotation of the first wheel 110 and the second wheel 120 again; after the first traction rope 210 and the second traction rope 220 are tensioned, the fastener 130 is switched to the second state again.
[0072] The traction rope tensioning method of this embodiment can improve the consistency of the tension of the first traction rope 210 and the second traction rope 220; and when it is necessary to re-tension the first traction rope 210 and the second traction rope 220, it also has the advantages of simple process and easy operation.
[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.
Claims
1. A dial assembly for use in a traction mechanism, characterized in that, The dial assembly includes a first disc and a second disc. The first disc is used to fix the proximal end of the first traction rope of the traction mechanism, and the distal end of the first traction rope is fixed to the distal end of the active bending section of the insertion part. The second disc is used to fix the proximal end of the second traction rope of the traction mechanism, and the distal end of the second traction rope is fixed to the distal end of the active bending section of the insertion part. The dial assembly further includes a fastener for connecting the first wheel and the second wheel. The fastener has at least a first state and a second state. When the fastener is in the first state, the first wheel and the second wheel are rotatably connected. When the fastener is in the second state, the first wheel and the second wheel are fixedly connected.
2. The dial assembly according to claim 1, characterized in that, The first wheel is provided with a first fixing part, which is used to fix the first traction rope, and the first fixing part protrudes from the side wall of the first wheel; The second wheel is provided with a second fixing part, which is used to fix the second traction rope, and the second fixing part protrudes from the side wall of the second wheel.
3. The dial assembly according to claim 2, characterized in that, The distance between the first fixing part and the second fixing part satisfies: L1 < 1 / 3L2. Wherein, L1 is the sum of the arc lengths of the first and second disks between the first fixing part and the second fixing part. L2 is the circumference of the disk containing the first or second roulette wheel.
4. The dial assembly according to claim 2, characterized in that, One of the first and second roulette wheels is further provided with a protrusion, the protrusion protruding from the side wall of the first or second roulette wheel, and the distance between the protrusion and the first or second fixing part satisfies: L3 < 1 / 3L2. Where L2 is the circumference of the disk containing the first or second roulette wheel. L3 is the sum of the arc lengths of the first wheel and / or the second wheel between the protrusion and the first or second fixing part.
5. The dial assembly according to any one of claims 1 to 4, characterized in that, The first roulette wheel and the second roulette wheel overlap each other; or One of the first wheel and the second wheel is provided with a receiving groove, and the other of the first wheel and the second wheel is embedded in the receiving groove, so that the first wheel and the second wheel form a nested structure.
6. The dial assembly according to claim 5, characterized in that, In the first wheel and the second wheel, one of the receiving grooves is further provided with a sliding groove, and the other is provided with a first mounting hole. The sliding groove and the first mounting hole are connected to each other, and the sliding groove and the first mounting hole are used to install the fastener. The chute has an arc-shaped structure, and the projection of the chute in the direction of the second wheel is at least partially located on the second wheel.
7. The dial assembly according to any one of claims 1 to 4, characterized in that, The first wheel has a second mounting hole, and the second wheel has a third mounting hole, which are coaxially arranged.
8. A traction mechanism for use on an endoscope, characterized in that, The traction mechanism includes a dial assembly, which is the dial assembly according to any one of claims 1 to 7; The traction mechanism further includes a first traction rope and a second traction rope. The distal end of the first traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the first wheel of the dial assembly. The distal end of the second traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the second wheel of the dial assembly.
9. An endoscope, characterized in that, It includes a handle and an insertion part, the handle and the insertion part are connected, and the handle includes a traction mechanism, the traction mechanism being the traction mechanism of claim 8.
10. A method for tensioning a traction rope based on the pulley assembly according to any one of claims 1 to 7, characterized in that, Includes the following steps: The distal end of the first traction rope of the traction mechanism is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the first wheel disc; The distal end of the second traction rope of the traction mechanism is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the second wheel. Control the fastener to be in the first state; Control the rotation of the first and second wheel discs, and keep the first and second traction ropes in a tensioned state; The fastener is controlled to be in the second state.